| Summary: | 碩士 === 國立臺灣大學 === 資訊網路與多媒體研究所 === 106 === The Virtual Reality (VR) sickness is a crucial issue when the users move in immersive virtual environments. The intense optical flow caused by virtual movements could make the users feel uncomfortable. Accordingly, many works and literature have worked on reducing the optical flow to alleviate the VR sickness. A lot of modern VR applications use blink teleportation [1] to hide the translation or a FOV restrictor [2] to decrease the users’ the optical flow of peripheral vision. However, blink translation can interrupt the users’ immersion, interference the spatial information gathering and lead to disorientation. On top of that, reducing the FOV will decrease spatial updating performance [3]. Therefore, we employ an additional spatial structure, a tunnel constructed by many portals, to retain users’ spatial awareness and offer a comfortable and immersive experience to the users. Three user studies are conducted for a well-designed tunnel used in our experimental virtual environment. In study 1, the thickness ratio parameter of each portal is adjusted to let users move comfortably. In study 2, we want to find the relationship between the brightness of the tunnel and the users’ preference, and the transparency of the tunnel is also adjusted to let users feel comfortable when moving in the tunnel. In the final study, we compare the tunneling teleportation with the blink teleportation based on the users’ comfort and the performance of the spatial orientation and the spatial information gathering. We suggest that VR developers can employ the tunneling teleportation to provide a comfortable and immersive experience.
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